NavGeneral InfoEmail Print Geography Sudan (SDN) North Darfur Coverage type Subnational Time period covered 02/1988 - 03/1988 Data type Survey Keywords Vision loss, Vitamin A deficiency Citation Contributors Helen Keller International Federal Ministry of Health (Sudan) Suggested citation Federal Ministry of Health (Sudan), Helen Keller International. Sudan - Northern Darfur Vitamin A Deficiency and Xerophthalmia Prevalence Assessment Survey 1988. GHDx Entry last modified on: Aug 16, 2021